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Finding the Fourth Proportional to 9,280.75, 12,807.48 and 5,554.75

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Solution

The fourth proportional to 9,280.75, 12,807.48 and 5,554.75 is: 7,665.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,280.75 : 12,807.48 = 5,554.75 : x
  2. Step 2: Convert to fraction form
    9,280.75/12,807.48 = 5,554.75/x
  3. Step 3: Cross multiply
    9,280.75x = 12,807.48 × 5,554.75
  4. Step 4: Simplify right side
    9,280.75x = 71,142,349.53
  5. Step 5: Solve for x
    x = 71,142,349.53/9,280.75
  6. Step 6: Final answer
    x = 7,665.58

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Half scale
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Double scale
Find fourth proportional to 9,281.75, 12,808.86 and 5,555.75
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.